Turns over without turning ign key

Hi all,
I need some guidance
My ?lan has been working fine and I went to start it the other day tried and failed.
When I turn the ign off the engine continued to turn over slowly.
I ended up disconnecting the battery to stop it.
Every time I re connect it continues to turn over.
What can cause this?
Thanks
I need some guidance
My ?lan has been working fine and I went to start it the other day tried and failed.
When I turn the ign off the engine continued to turn over slowly.
I ended up disconnecting the battery to stop it.
Every time I re connect it continues to turn over.
What can cause this?
Thanks